It's mfg date is 3/79, made in Louisville ,KY. It's an 18500btu,230v. Room air conditioner. It needs a REALLY GOOD cleaning, but I can't get it to slide out of the outer case. It won't let me add a pic of the cooling fins. They aren't the regular kind. These are like brushes made of aluminum. And theyre caked from being operated w/o a filter. Yuck! There are no screws I can find that would be holding it in there. Please help!